The present invention relates to compounds of general formula I,
wherein the groups (Het)Ar and R
1
are defined as in claim
1
, which have valuable pharmacological properties, in particular bind to the GPR40 receptor and modulate its activity. The compounds are suitable for treatment and prevention of diseases which can be influenced by this receptor, such as metabolic diseases, in particular diabetes type 2.
Novel ramoplanin derivatives are disclosed. These ramoplanin derivatives exhibit antibacterial activity. As the compounds of the subject invention exhibit potent activities against gram positive bacteria, they are useful antimicrobial agents. Methods of synthesis and of use of the compounds are also disclosed.
Efficient Synthesis of 1,5-Disubstituted Tetrazoles
作者:Alan Katritzky、Chunming Cai、Nabin Meher
DOI:10.1055/s-2007-966001
日期:2007.4
A general method for the synthesis of 1,5-disubstituted tetrazoles from imidoylbenzotriazoles that involves mild reaction conditions and short reaction times.
一种由亚氨基苯并三唑合成 1,5-二取代四唑的通用方法,反应条件温和,反应时间短。
Improved conditions for converting sterically hindered amides to 1,5-disubstituted tetrazoles
作者:Gretchen M. Schroeder、Sydney Marshall、Honghe Wan、Ashok V. Purandare
DOI:10.1016/j.tetlet.2010.01.024
日期:2010.3
Improved conditions for converting amides into 1,5-disubstituted tetrazoles are described. The optimum reaction conditions [diisopropyl azodicarboxylate (DIAD), diphenylphosphoryl azide (DPPA), and diphenyl-2-pyridyl phosphine in THF at 45 °C] converted stericallyhinderedamides to their corresponding tetrazoles in good yield.
A study of annular tautomerism, interannular conjugation, and methylation reactions of ortho-substituted-5-aryltetrazoles using carbon-13 and hydrogen-1 n.m.r. Spectroscopy
作者:Richard N. Butler、Victor C. Garvin
DOI:10.1039/p19810000390
日期:——
2′-MeC6H4, 2′-ClC6H4, or 2′,6′-Cl2C6H3), the rings are twisted out of the planar configuration and interannular conjugation is inhibited. In each case the tetrazole 1-NH tautomêr is strongly predominant. When the rings are coplanar, as in para-substituted-5-phenyltetrazoles, the electron-withdrawing effect of the para-substituents changes the tautomerism significantly back towards the 2-NH form. Methylation